Stop mechanism for turret lathes



(No Model.) 3 Sheets-Sheet '1. I'. AIH. RICHARDS.

STOP MEGHANISM FOR TURRET LATHBS.

10,496,065 Patented Apr. 25, 1893'.

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Patented Apr. 25, 1893..

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(No Model.) 3 Sheets-Sheet 3. F. H. RICHARDS.

sToP MEGHANISM FOR TURRBT LATHBS. y i No. 496,065. Patented Apr. 25, 1893.

UNITED STATES PATENT OFFICE.

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO W'ALTER WOOD, OF PHILADELPHIA, PENNSYLVANIA.

STOP MECHANISM FOR TURRET LATHES.

SPECIFICATION forming part of Letters Patent No. 496,065, dated April 25, 1893.

Application filed March 29, 1 892,

To @ZZ whom it may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Stop Mechanisms for Turret-Lathes, of which the following is a specification.

This invention relates to stop mechanisms for the slides of turret-lathes; the object being to furnish a stop-mechanism having a multiplicity of adjustable stops, one for each tool carried by the turret, so that the stroke of each tool may be regulated and limited independently of the other tools of the set. My present invention is in the nature of an improvement on the stop mechanism described in prior Letters Patent No. 481,192, dated August 23, 1892.

In the drawings accompanying and forming a part of this specification, Figure 1 is a plan view of the slide-block, turret-slide and turret of a turret-lathe furnished with my improvements. Fig. 2 is a front elevation of the same. Fig. 3 is a central vertical section, in line a, a, Fig. 1. Fig. 4 is an end elevation as seen from the right-hand of Fig. 2. Fig. 5 is an enlarged cross-sectional view, on the line b b, Fig. 3, as seen from the left-hand in said figure. Fig. 6 is a view, similar to Fig. 3, of a modified form of the mechanism. Fig. 7 is an end elevation of the same, as seen from the right-hand of Fig. 6. Fig. Sis a crosssectional view on the 'line c c, Fig. "6, as seen from the left-hand in said figure.

The slide-block, C, is in a general way substantially the same as the slide'blocks of ordinary turret-lathes, being fitted to receive the turret-slide, and to be fixed to the bed of a lathe in the usual manner. The turret-slide, D, is arranged to slide in ways formed in said block, and is or may be heldinplace thereon by the usual straps, 22 and 24. The turret E is removably supported on the forward end of said slide by means of a stud, or column, 2, which I have shown formed integral with said slide, after the manner described in Letters Patent No. 480,962, granted to me August 16, 1892. Said turret isbored to tit closely, but to normally turn freely, on said column, and a suitable cap, as 3, is provided Serial No. 426,951. (No model.)

for holding the turret in place thereon. The set of slide-stops, corresponding to the divisions of the turret, are carried by a stop-cylinder which is pivotally supported in the slideblock, and is actuated through suitable connecting mechanism (as, forinstance, a system of gearing), from the turret to have corresponding movements therewith. Where the proportions and arrangement, in any particular instance, of the principal parts will permit of it, the cylinder-actuating gearing may consist of ordinary bevel-gears, asillustrated in Fig. but I prefer to use the system of spur and worm wheels illustrated in Figs. 1 to 5, inclusive. Referring to said Figs. 1 to 5, the turret E is shown provided with the` turret-gear 4, which is fixed to the underside of the turret by means of suitable screws, as 5, or otherwise. The slide D is bored at 6, Fig. 5, to receive the worm-shaft 7, to whose upper end is fixed a pinion, 8, that meshes with said turret-gear 4; to the lower end of said shaft 7 there is fixed or formed thereon a worm, 9, which meshes with a worm-wheel, 10, that is carried by a sleeve, 12, journaled on the shaft 13. As a convenient means for supporting the shaft 13 in the slide, this shaft is shown carried by the bearings, or blocks, 14 and 15, which are fixed to the slide D by means of suitable screws, 16. The shaft 13 and the parts`carried`thereon lie within a recess, 17, which is formed in the slide for that purpose. The sleeve- 12, in' addition to the Wheel 10, also carries a spur-wheel, 1S, acting as a stopwheel, whose teeth mesh with the ribs, or teeth, 19, that are formed on, and longitudinally of, the stop-cylinder 20. This cylinder is j ournaled at 2l and 23 in the front and rear end-walls, respectively, of the slide-block C, and is connected to receive a series of stops, 25, together with the stop-actuating screws 26. Said stops should be equal in number to the divisions of the turret, each division having a separate stop corresponding thereto, and which may be set independently of the other stops, to limit the forward movement of the turret-slide.

As a means for properly holding the stops 25 in place, these are fitted into under-cut grooves, as 32, formed in the carrier 20, and opening outwardly, through slots, 33,into the ICO spaces between the aforesaid teeth, 19, of the carrier. The projecting portion of the sliding stop stands within said tooth-space, and strikes the tooth of the gear 18, as will be understood from comparison of Figs. 3 and 5. By means of the construction described, the stops (these projecting through said slots as shown) are prevented from turning on their respective actuating-screws, 26; which screws are journaled at 28 in the rearward end of the carrier 20, being held in place longitudinally by the cap 29 and its binding-screw 30. As shown in Fig. 3, the screws 26 extend (or may extend) substantially the whole length of the stop-carrier, thereby obtaining the greatest range of movement for the several stops. By this means one stop may be set to limit the forward movement of the slide D to the position shown in Figs. 1, 2 and 3; while another stop may be set much farther toward the left-hand in said figures, for a much longer slide-stroke.

It will, of course, be Vunderstood that the stops are brought successively -into working position at the upper side of the carrier in Figs. 3 and 5, on the turning of the turret to bring the successive tool-sockets, 27, of the turret to the forward end of the turret-slide. For this purpose, the gearing intermediate to the stop-cylinder and the turret isso proportioned that the turretA and stop-carrier will have corresponding rotary movements;

In the more simple form of my improvements shown in Figs. 6, 7 and 8, the stop-carrier, together with its stops and the means for adjusting the same longitudinally of the carrier, is substantially the same as described in connection with Figs. 1 to 5, inclusive; but the intermediate gearing for actuating the stop-carrier from the turret consists -in this instance of the following details: The splned shaft 40` is fitted to slide within the bore 41 of the stop-carrier, the outer end of said shaft being journaled in the bearing 42 projecting from the under side ofthe turretslide D; to this shaft is fixed the gear 48, which meshes with a corresponding gear, 44, that is ixed to the lower end ot', a shaft, 45, journaled in the turret-slide and connecting at its upper end, through the flange 46 and dowel-pin 47, with the turret E. On the sliding of the turret-slide upon the slide-block C, the splined shaft 40 slides within the bore 41 of the stop-carrier, thereby maintaining the proper operative connection between said turret and stop-carrier. In this forin of the mechanism, the slide D is shown furnished with the stop-screw 48 for regulating the position of the turret-slide independently of the adj ustment of the stops 50 on the stop-carrier. For said adjustable stop 48 there maybe substituted an ordinary fixed stop (not herein shown) for engaging the described adjustable stops on the revoluble stop carrier. The mode of operation of the modification here described, being substantially the same as that of the preferred construction shown in Figs. 1 to 5, inclusive, will, it is thought, be fully understood without further explanation.

Having thus1 described my invention, I claim- 1. In astop-mechanism for turret-lathes, the combination with the turretslide and its supporting slide-block, of the turret revolubly mounted on said slide, the revoluble stop-carrier provided with a series of stop-ways and supported in the slide-block longitudinally of the slide-movement, a series of sliding stops independently adjustable longitudinally of said ways", and gearing connecting the stopcarrier with the turret on the slide, whereby the series of stops may be successively brought into working position, substantially as described. y

2. In a stop-mechanism for turret-lathes, the

:i combination with the turret-slide and its supporting slide-block, of the turret revolubly -mounted on said slide, the revoluble stop carrier provided with a series vof step-ways and supported in the slide-block longitudinally of the slide-movement,a series of stops adj ustable longitudinally of said carrier, stopactuatiug screws journaled in the stop-carf rier for sliding said stops, connecting gearing j intermediate to the stop-carriera'nd turretfor imparting corresponding `rotary movements thereto; anda single adjustable `stop Qn the turret-slide for engaging successively the series of stops on the stop-carrier, substantially as set forth. Y

3. In a stop-mechanism for turret-lathes,

the combination with the turret-slide and its supporting slide-block, of the turret revolui bly mounted on said slide, the revoluble stopcarrier supported in theslide-block longitudinally of the slide-movement and having thereon a series of ribs serving as gear-teeth, a series of stops substantially as described adj ustable longitudinally of said carrier, ,and connecting-gearing substantially as ,described intermediate to the turret and said carrier, for rotating said carri-er by engagement with the said teeth thereof, substantially as described. l v j 4. In a stop-mechanism of the class specied, the combination with the turret-slide having the turret revolubly mounted thereon,

and with the revoluble stop-carrier, supported independently of the slide; of the shaft 7 carried by the turret-slide, gearing operatively kconnecting said shaft with the turret',.and

gearing operatively connectingsaidshaft with the stop-carrier, whereby the turret and stopcarrier have corresponding rotary movements,

- substantially as set forth.

5. In a stop-mechanism of the class specied, the combination with, the turret-slide and its adjustable stop, of the revoluble stop- 1 carrier h aving a series of under-cut grooves longitudinally thereof, a series o'f stops tted to slide in said grooves and projecting therefrom to engage the turretslide stop, and

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7. In a stop-mechanism of the class specied, the combination with the turret-slide having the turret revolubly mounted thereon, and with the revoluble stop-carrier having a series of stops and having gear-teeth longitudinally of the carrier, of the turret-gear 4 fixed on the turret, the stop-Wheel having teeth meshing with the stop-carrier, and gearing substantially as described intermediate to and connecting said turret-gear and stop-gear, z 5

,Substantially as set forth.

FRANCIS H. RICHARDS. Witnesses:

HENRY L. RECKARD, HANS MALLNER. 

